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24 June, 01:51

How much heat is needed to raise the temperature of 90g of water by 64oC?

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  1. 24 June, 02:13
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    The heat released or absorbed by a process where temperature changes is calculated from the product of the mass of the sample, its heat capacity (4.18 J/g C for water) and the change of the temperature.

    Heat = mC (T)

    Heat = 90 (4.8) (64) = 27648 J or 27.65 kJ needed
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